Your safest bet is to get him to a hospital. Since he isn't willing to go himself and his condition worsens, call the paramedics and tell them the situation. Depending on how many he took, it could be deadly. Please get him the help he needs.

Based on the known pharmacologic actions of the drug, overdose may cause drowsiness,hypothermia,tachycardia and other cardiac rhythm abnormalities such as bundle branch block, ECG evidence of impaired conditions, and congestive heart failure. Other manifestations may be dilated pupils, convulsions, severe hypotension, stupor and coma.

Please share this with your boyfriend and get him some help asap. If he has taken more than 60 mg in one day then he has taken too much.

I took flexeril once (I hope it is the last time) I had jerking movements throughout my body and almost seizure like activity, in the literature it says that anything that happens that is not usual the person needs to be evaluated by a doctor, we both know this isn't normal and he needs to be checked by the prescribing doctor who is familiar with his case history, then they may be able to come to the conclusion as to why this is happening. please keep trying to get him to allow you to get him either to the doctor or to an emergency room, Keep us posted, I wish you only the very best